Hi, RD7, and wecome to the SSC! And a very big set of Congratulations to you for starting this Final Quit!
About the stress of not smoking and work - bring lots of healthy snacks with you like baby carrots and a diet-wise dip... make sure you have iced water on hand and be ready to do deep breathing at your desk.
As for mixing with smokers, I'd say that you'ld be well advised to keep your distance from them when you step outside the office... wave nicely as you tell your old buddies that you're just going for a walk for some fresh air...
As for the overtiredness and becoming weak in the face of cravings, you're already well prepared this time and you have the memory of how it felt to be 11 years without smoke; go get yourself a bottle of B Complex tablets and watch that you take in good food into your system for the next months coming...
start a small regime of stretching exercises when you get up in the morning and maybe a few Yoga poses and that may well spark up your energy levels... either way, when you get stressed and tired, come in here and ask for Help! in a new thread and wait for 5-10 replies...
Set up your mileage /quit meter... it's great to watch your progress from day to day
Patrick
My Milage:My Quit Date: 1/18/2008
Smoke-Free Days: 153
Cigarettes Not Smoked: 3,825
Amount Saved: $1,721.25
Life Gained:Days: 28
Hrs: 10
Mins: 43
Seconds: 53